Quantum Realm, a concept that has recently become very popular because of the Marvel Cinematic Universe (MCU) movies is actually a lot more than what people know. It is not just a dimension accessible through special energy or transporting tools. In fact, we live in the quantum realm. However, these effects are not visible as they are noticeable only at the quantum/atomic level.
“A reality where all concepts of time and space become irrelevant as you shrink for all eternity”, the quantum realm is quite an interest concept but there is very little that has been known about it.
If you are also fascinated by the concept of Quantum Mechanism and want to know how it came into existence and where exactly it is present in the universe, then you can refer the free eBook by Robert E. French, “A Model of the Physical World”.